Unicode Decoder

Decode Unicode to plain text

Unicode to Text

How it works

This tool converts Unicode encoded strings into plain text. It supports three common Unicode formats:

• JavaScript escape format: \u4e2d\u6587
• HTML hex format: 中文
• HTML decimal format: 中文

Examples

Unicode	Text
\u4e2d\u6587	中文
中文	中文
中文	中文
\u0041\u0042\u0043	ABC

JavaScript Code Explanation

The conversion logic handles three Unicode formats:

// 1. JavaScript escape format: \u4e2d\u6587
const jsFormat = input.replace(/\\u([0-9a-fA-F]{4}|{[0-9a-fA-F]+})/g, (_, code) => {
  const hex = code.replace(/^{|}$/g, '');
  return String.fromCharCode(parseInt(hex, 16));
});

// 2. HTML hex format: 中文
const htmlHexFormat = input.replace(/&#x([0-9a-fA-F]+);/g, (_, hex) => 
  String.fromCharCode(parseInt(hex, 16))
);

// 3. HTML decimal format: 中文
const htmlDecFormat = input.replace(/&#[0-9]+;/g, (_, dec) => 
  String.fromCharCode(parseInt(dec, 10))
);

How it works:

1. Regex Matching: Each format uses a regular expression to find Unicode sequences in the input string
2. Hex/Decimal Parsing: parseInt(hex, 16) converts hexadecimal to decimal, parseInt(dec, 10) handles decimal
3. Character Conversion: String.fromCharCode(code) converts the numeric code point to the actual character
4. Replacement: The matched Unicode sequence is replaced with the decoded character

Key functions:

• String.fromCharCode() - converts Unicode code point to character
• parseInt(string, radix) - parses string to integer in given base (16=hex, 10=decimal)
• RegExp with capture groups - extracts the numeric code from each format